Public and Private Clouds: Working Together
Anthony Young Principal Architect, Rackspace Cloud Builders
[email protected]
About Me • Principal Architect, Rackspace Cloud Builders
• Responsible for dev efforts related to Rackspace Private Edition • Previously software engineer at Anso Labs, acquired by RAX Jan 2011 •
[email protected]
About Rackspace Cloud Builders • Available to help service providers and enterprises build and support OpenStack clouds • Training, deployment and ongoing support
• Key engineering resources driving OpenStack • Operational expertise from Rackspace Cloud
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About OpenStack
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The Pieces of OpenStack OpenStack Compute (Nova)
OpenStack Object Storage (Swift)
OpenStack Image Service (Glance)
The Pieces of OpenStack • Dashboard • Identity Management
• Networking • Load balancers • Database • Queueing
Some Stats • 1,500+ active participants • 17 countries represented at Design Summit • 60,000+ downloads • Worldwide network of user groups (North America, South America, Europe, Asia and Africa)
OpenStack Community Today
OpenStack, the Cloud Operating System Management Layer That Adds Automation & Control
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OpenStack in a nutshell • A cloud operating system that turns datacenters into pools of resources – the next evolution from server virtualization • Provides a management layer for controlling, automating, and efficiently allocating these resources
• Empowers operators, sys admins and end users via selfservice portals (“I want AWS-type service!”) • Gives developers the capability to build cloud-aware applications via standard APIs
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Why Service Providers Are Adopting • Originated by Rackspace and NASA
• Designed to scale cost effectively • Emerging standard backed by large ecosystem • Open source with no lock-in or license
• No desire to build proprietary clouds
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Challenges of Cloud Interoperability
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OpenStack Goes Beyond A Single Datacenter… Enterprise Private Clouds Run Cloud Operating Systems
Public Clouds Run Cloud Operating Systems
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OpenStack Goes Beyond A Single Datacenter… Imagine Having an Open, Common Platform Across Clouds…
Seamlessly transporting workloads
This is true Cloud Federation!
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An Open, Common Platform is Here
Private Clouds Run OpenStack Software In Your Own Corporate DC or Colocation Facility
Public Clouds Run Highly Scalable Cloud Software Proven by Some of the World‟s Largest Cloud Providers
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Well… almost • Today, there are still technical challenges that have to be addressed before users of OpenStack clouds can reliably create cross-cloud compatible applications.
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Key Use Case • Anne is running an application on a Private Cloud. She is now experiencing higher than average workload, so she launches several dozen application instances on a Public Cloud.
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Challenges • Even if we assume the same API amongst cloud providers, there are a variety of challenges that we have identified that need to be addressed if we want to enable Anne‟s use case.
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Challenges • If the implementation of all clouds were the same, accomplishing federation would be easy. • However, public and various private clouds are likely to have different requirements that will dictate different internal technology choices, even if they share the exact same external API. Private OpenStack Cloud
Public OpenStack Cloud
Hypervisor: KVM Image Format: qcow2 Networking: FlatDHCP Instance Auth: Public Key
Hypervisor: XenServer Image Format: VHD Networking: Flat + multi-nic Instance Auth: Password
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Challenges • Thus, in order to achieve interoperability between OpenStack clouds, points of compatibility must be defined for: • Image Format • A variety of disk formats are used in different clouds (qcow2, vhd, raw) – which must be supported by all? How can they be constructed such that they work on multiple hypervisors? • Instance Networking • Specific deployments may use different networking models internally, may have different numbers of nics, etc • Instance Configuration • How should instances configure authentication, handle user specific data, installation of paravirtualization drivers, etc?
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Image Format • Depending on choice of hypervisor, and specific desired operational characteristics, deployers are likely to prefer the use of „non standard‟ internal image formats. • For interoperability, the community needs to agree on a common “Golden” format that all clouds must be able to support. • All clouds must be able to import/export the “Golden” format. Internally, clouds will likely decide to use a format that is optimal for their own configuration.
• Idea: use RAW as a golden image format 21
Instance Networking • At present, there are a few techniques that are available to configure networks in OS • DHCP • What about multi-nic? • Flat injection • Cloud configuration drive?
• We need to define a standard method for instance networking that will work in a wide variety of deployment scenarios • What happens when a cloud instance with one DHCP configured nic gets migrated to a public cloud with 2 nics?
• Idea: Use DHCP for basic networking. Use a guest agent + metadata service for multi-nic and other advanced networking functions 22
Instance Configuration • At present, there are a variety of techniques that are available in OS for instance configuration • EC2 Metadata • File injection • Cloud configuration drive
• Idea: OS Metadata service + OS guest agent
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Putting it all together – example flow • Anne exports an image from Private cloud in RAW format • Anne imports her image into the Public Cloud • Internally, this instance is converted to an optimized format
• Anne boots her image • Her instance gets an ip address for the primary interface • OS guest agent launches, and connects to a metadata service to get additional information • Configures a secondary interface • Installs Paravirtualization drivers (like xenserver tools) • Executes user data
• Anne accesses her instance and launches her app 24
Still lots to do • Need to vet proposed strategy with community, partners, and other deployers • Once key compatibility points are agreed upon, implement feature gaps • Integrated testing for “Golden Flows”
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How You Can Participate • Website: www.openstack.org
• Mailing Lists: http://lists.openstack.org • Wiki: http://wiki.openstack.org • Twitter: @openstack
Thank You!
Anthony Young Principal Architect, Rackspace Cloud Builders
[email protected]
